An NMR thermometer for cryogenic magic-angle spinning NMR: the spin-lattice relaxation of 127I in cesium iodide
Sarkar, Riddhiman, Concistre, Maria, Johannessen, Ole G., Beckett, Peter, Denning, Mark, Carravetta, Marina, al-Mosawi, Maitham, Beduz, Carlo, Yang, Yifeng and Levitt, Malcolm H. (2011) An NMR thermometer for cryogenic magic-angle spinning NMR: the spin-lattice relaxation of 127I in cesium iodide. Journal of Magnetic Resonance, 212, (2), 460-463. (doi:10.1016/j.jmr.2011.08.021).
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Description/Abstract
The accurate temperature measurement of solid samples under magic-angle spinning (MAS) is difficult in the cryogenic regime. It has been demonstrated by Thurber et al. (J. Magn. Reson., 196 (2009) 84-87) [10] that the temperature dependent spin-lattice relaxation time constant of 79Br in KBr powder can be useful for measuring sample temperature under MAS over a wide temperature range (20–296 K). However the value of T1 exceeds 3 min at temperatures below 20 K, which is inconveniently long. In this communication, we show that the spin-lattice relaxation time constant of 127I in CsI powder can be used to accurately measure sample temperature under MAS within a reasonable experimental time down to 10 K.
| Item Type: | Article |
|---|---|
| ISSNs: | 1090-7807 (print) 1096-0856 (electronic) |
| Keywords: | solid state NMR, magic angle spinning (MAS), temperature measurement |
| Subjects: | Q Science > QD Chemistry T Technology > TP Chemical technology |
| Divisions: | Faculty of Natural and Environmental Sciences > Chemistry Faculty of Engineering and the Environment > Engineering Sciences |
| Item ID: | 337238 |
| Date Deposited: | 20 Apr 2012 10:43 |
| Last Modified: | 05 May 2012 08:32 |
| Contributors: | Sarkar, Riddhiman (Author) Concistre, Maria (Author) Johannessen, Ole G. (Author) Beckett, Peter (Author) Denning, Mark (Author) Carravetta, Marina (Author) al-Mosawi, Maitham (Author) Beduz, Carlo (Author) Yang, Yifeng (Author) Levitt, Malcolm H. (Author) |
| Funder: | EPSRC, Royal Society |
| Date: | October 2011 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/337238 |
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